Unbeknownst to the cast and crew, several of the skeletons ordered for the production were real human skeletons (as opposed to replicas). When this was discovered, some crew and cast members demanded an exorcism or cleansing be performed on set, as they had already been feeling uneasy on-set before learning this, and felt the real skeletons may have brought some unwanted spirits to the set. Co-star Will Sampson, who like his character was a real-life shaman, offered to return to set one night after everyone else went home in order to perform an exorcism ritual. Reportedly, the mood and feeling on set greatly improved afterwards.